■ Sludge drying/ Drying of sticky and adhesive materials that no other dryer can deal with. International patent technologies


No matter how sticky, adhesive and viscous the material is, KENKI DRYER of International Patent can dry it without clogging inside of dryer and with stable operation that no operational trouble occurs because of its unique mechanism. For example, even materials stuck to the blades of one screw, blades of the other screw in the dryer’s body forcibly peels the materials off as they rotate. Since the blades rotate by peeling the material off each other, any sticky, adhesive and viscous material does not adhere to the blade, and the blades continue rotating, peeling, agitating and heating material without stopping while they carries material further. Also, since surface of blades are always renewed and kept clean, heat near the blades is not blocked and it is conducted directly into the materials.
Sludge after dehydration process of waste water treatment is often affected by flocculants and forms large lumps, and it frequently happen that only surface is dried but inside are not when sludge is discharged as large lumps.
In the drying process of KENKI DRYER certificated as International Patent, the material to be dried are moved forward into the dryer’s main body smoothly by being heated and crashed with a feeder at inlet. The materials get smaller and smaller since they are continuously sheared and agitated during being conveyed and heated. As the material get small, heat reaches to inside more smoothly and surely, and quality of outputs becomes stable.
Since KENKI DRYER has simple structure, initial cost is low and is estimated to be repaid with cost of industrial waste disposal for about 2 -3 years. Also, even heat source of drying is only saturated steam, epochal mechanism based on combined use of conductive heat transfer method and heated air method helps to achieve high quality of safety and hygiene, and running cost can be kept low by using surplus steam within factory. Machine operation is easy and there is no need to assign operators because it is continuous operating system. Since number of replacement parts is small, maintenance is easy and maintenance cost is very low.
Because of low-temperature drying, components of the material to be dried are hardly changed and organic sludge can be sold as fuel, fertilizer, etc. after being dried. Because the low-temperature drying does not use fire, temperature of the dryer’s outer surface is low and the dryer is safe and hygienic. Because fresh air from outside is cut off, temperature inside of the dryer is kept high, amount of moisture in the exhaust air discharging water is small, and the discharged water can be returned to wastewater treatment facilities. 
Since KENKI DRYER consumes small amount of saturated steam as its heat source, there is no need to introduce additional boilers and also decarbonation and fuel cost reduction are possible by using left-over steam in factories.
Patented in Japan, U.S.A, Taiwan, France, Germany, UK, Switzerland, Canada.

KENKI FDRYER reason for introduction sludge dryer kenkidryer 02112021


Changes before and after drying kenki dryer 07122021


Industrial waste cost reduction kenki dryer 08122021


■ Why do we dry sludge which is difficult to be treated? / KENKI DRYER




■ Self cleaning mechanism / KENKI DRYER




Effects and measures of flocculants in sludge / KENKI DRYER




■ Drying of strongly sticky and adhesive organic sludge




■ Sludge dryer / Comparison of products

1. Comparison with hot air dryer

Type of DRYERKENKI DRYERHot air dryer
Heat sourceSteam Hot air
Temperature of heat source

Adjusted to installation condition
From 100℃ to 165℃

Very high temperature
Need to prevent to adhere inside of dryer
Condition of the materials after drying

There is no uneven burning and scorch

There is  uneven burning and scorch 
Dust collectorNot necessaryNecessary 
Fuel costCheapExpensive 
Frequency of parts replacementLowHigh 
Drying of sticky and adhesive materials
Initial cost
Running cost
Maintenance cost


2. Comparison with indirect dryer using steam

Type of DryerKENKI
VacuumDrumDisk PaddleInner tube
Amount of water evaporation×
Drying of sticky and adhesive materials
 Initial cost



■ Comparison between KENKI DRYER and other competing dryers / Summary video



Competitive comparison


Exhaust processing KENKI DRYER


■ Decarbonization / KENKI DRYER




■ Low temperature drying / KENKI DRYER




■ Drying of liquid flocculants(PAC)




Self-cleaning screw

Global patents

Heat source, Steam